To make your Nerf stryfe blaster cooler and more tactically, Worker Mod F10555 developed a number of front tube kits, most of which require an adapter attachment to fit.
So, please check the installation instruction as below,
Step 1, Remove the external screw from the styfe and remove the shell,
Step 2, Remove the front pipe assembly and buckle,
Step 3, replace the styfe adapter attachment,
Step 4, cover the blaster shell, screw on and complete the installation,have fun.